Home / 389,140.20-583,019.10-318,637.80

Finding the Fourth Proportional to 389,140.20, 583,019.10 and 318,637.80

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Solution

The fourth proportional to 389,140.20, 583,019.10 and 318,637.80 is: 477,390.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,140.20 : 583,019.10 = 318,637.80 : x
  2. Step 2: Convert to fraction form
    389,140.20/583,019.10 = 318,637.80/x
  3. Step 3: Cross multiply
    389,140.20x = 583,019.10 × 318,637.80
  4. Step 4: Simplify right side
    389,140.20x = 185,771,923,381.98
  5. Step 5: Solve for x
    x = 185,771,923,381.98/389,140.20
  6. Step 6: Final answer
    x = 477,390.73

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.